D defs.my
Entry 1 sense Webster, 1913

Penetrable

· Pen·e·tra·ble · IPA /ˈpɛnətɹəbəl/
01 a. Capable of being penetrated, entered, or pierced. Used also figuratively.
  1. 1.
    Capable of being penetrated, entered, or pierced. Used also figuratively.
    “And pierce his only penetrable part.” Dryden.
    “I am not made of stones, But penetrable to your kind entreats.” Shak.